Just before printing final plan information, dbcc traceon(310) prints the parallel configuration parameters and session level settings in effect when the command was run.
PARALLEL:
number of worker processes = 20
max parallel degree = 10
min(configured,set) parallel degree = 10
min(configured,set) hash scan parallel degree = 3
If session-level limits or simulated statistics in effect when the query is optimized, those values are shown in the output.
